What does it mean to receive a text message saying that the vertical code will turn into a yellow code and turn into a green code ten days later?

After receiving the text message, it is said that the vertical code will turn yellow and then green after ten days, which means that you are a contact now. Please isolate it for 10 days, and then change the code back if there is no problem.

1, received SMS+green code:

Home health monitoring 14 days, don't go out unless it is necessary. When it is really necessary to go out, strictly implement personal protective measures such as wearing masks, avoid going to crowded places, and don't attend weddings, dinners and other party activities.

2. Received SMS+yellow code

: Report relevant information, stay at home for 14 days, no going out, and arrange nucleic acid testing for 3 times.

3. Received SMS+red team:

Immediately report relevant information to the community or grid staff: name, telephone number, ID number, address, and the latest nucleic acid detection time, and arrange centralized isolation and three times of nucleic acid detection at isolation points.